NAT-MCH Hub Module PCIe – Technical Reference Manual
10.3.8 Hot Plug Button 2 Register
The Hot Plug Button 2 Register controls together with the Hot Plug Button 1 Register
the value of the /HP_BUTTON balls of the corresponding PEX8532.
Table 16:
HP_BUTTON2 Register
2
nd
Hot Plug Button – Address 0x15
Default value 0xff
Bit
7
6
5
4
3
2
1
0
Access
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
Func -
HP_BUTTON[12:9]
Table 17:
HP_BUTTON2 - Register Bits
Bit
Name
Function
[7..0] HP_BUTTON
(12:9)
hese bits have to be cleared and set again, if an AMC’s
HP handle was attended.
HP_ BUTTON 9 is assigned to AMC9 and HP_
BUTTON 12 to AMC12
10.3.9 Hot Plug Power Enable 1 Register
The Hot Plug Power Enable Register 1 Register shows together with the Hot Plug
Power Enable 2 Register the value of the /HP_PWREN balls of the corresponding
PEX8532.
Table 18:
HP_PWREN1 Register
Hot Plug Power Enable 1 – Address 0x18
Default value 0x00
Bit
7
6
5
4
3
2
1
0
Access
R
R
R
R
R
R
R
R
Func HP_PWREN[8:1]
Version 2.0
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